Bump actions/download-artifact from 2 to 4.1.7 in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/oxrun.yml

@@ -87,7 +87,7 @@ jobs:
     steps:
       - uses: actions/checkout@v1
       - name: download coverage report
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
         with:
           name: code-coverage-report
       - name: remove artifact coverage report
@@ -111,7 +111,7 @@ jobs:
     steps:
       - uses: actions/checkout@v1
       - name: download oxrun-description
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
         with:
           name: oxrun-description
       - name: remove artifact oxrun-description